A Mom and a Family of Men!

Friday, April 16, 2010

Observing Sound Vibrations

Elijah finally finished up his energy unit with sounds and hearing. Elijah carried out his last experiment.


Take a can and remove both ends and attach a balloon that has been cut so it can fit over one side of the can tightly. Place a small amount of foil on the balloon. You can make it stick with a bit of glue.


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Hold the can to your mouth and speak, scream, hum, etc. through the open end as you shine a flashlight onto the foil. The light should bounce to the wall you are standing near. As you speak the light will move.


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